.loading-box{
  position: absolute;
  width: 100%;
  line-height: 30px;
  text-align: center;
  margin: 20px 0;
}
  
.loading-box .mask{
  width: 30px;
  height: 30px;
  background: transparent;
  margin: 0 auto;
  border-radius: 50%;
  border: 5px solid #ccc;
  border-left-color: #508EC3;
  border-right-color: #f0991e;
  animation:loading 1.3s infinite;
  animation-timing-function: ease;
}

@keyframes loading {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
